Deduplicate pair caption cast descriptors

tools/prompt_route_simulation.py

@@ -505,6 +505,22 @@ def _formatter_expectation_issues(
     return issues
 
 
+def _caption_cast_descriptor_issues(name: str, row: dict[str, Any] | None, caption_text: str) -> list[str]:
+    if not isinstance(row, dict):
+        return []
+    descriptor = row.get("cast_descriptor_text") or row.get("shared_cast_descriptors")
+    if isinstance(descriptor, list):
+        descriptor_text = "; ".join(str(item or "").strip() for item in descriptor if str(item or "").strip())
+    else:
+        descriptor_text = str(descriptor or "").strip()
+    if not descriptor_text:
+        return []
+    natural_descriptor = caption_naturalizer._natural_cast_descriptor_text(descriptor_text)
+    if natural_descriptor and caption_text.count(natural_descriptor) > 1:
+        return [f"{name}.caption: repeated_cast_descriptor"]
+    return []
+
+
 def _trace_dict(formatter_name: str, payload: dict[str, Any]) -> tuple[dict[str, Any], str]:
     trace_text = str(payload.get("route_trace_json") or "")
     if not trace_text:
@@ -637,6 +653,7 @@ def _formatter_issues(
         if "metadata" not in str(method or ""):
             issues.append(f"{name}.{formatter_name}: not_metadata_route:{method}")
     issues.extend(_formatter_trace_issues(name, formats, target=target, row=row))
+    issues.extend(_caption_cast_descriptor_issues(name, row, caption_text))
 
     for label, value in (
         (f"{name}.krea_negative", krea.get("negative_prompt")),